Is it your 1st baby? Have you tried anything to encourage you LO to turn?
DD was palpated as breech from 28 weeks, confirmed by scan at 35 weeks and born as a breech baby at home at 41+3 with IMs.
We did a lot of reading after the scan and came to the conclusion that a vaginal breech birth is not intrinsically dangerous as long as you have MWs skilled and experienced in vaginal breech birth. That, sadly, is often the stumbling block for women that would like to try to birth their breech babies vaginaly - NHS policy of recommending CS for breech babies (mainly based on a piece of research called the "Term Breech Trial" by Hannah et al in 2000, which has subsequently been widely discredited) has resulted in a massive deskilling of MWs and there are few left within the NHS that have the skill or any recent practice.
That said, something like 5% of babies are breech at term and 50% of those are undiagnosed before labour - so at least some breech babies are born vaginally. Even though some of those will become medicalised deliveries, some will still be MW led births (if only because there isn't time for the Drs to arrive before the baby is born!).
Two books I found very useful were "Breech Birth" by Benna Waites and "Breech Birth: What are my options" by Jane Evans. I found them both to be approachable and informative, and felt they were far more balanced than the information I got from the NHS registrar (who didn't even mention vaginal breeches till I asked, and didn't seem to know about vaginal breech births at all...). The Benna Waites book in particular has a chapter on complementary methods of encouraging your baby to turn that you might want to have a look at.
If you are interested in vaginal breech birth, make sure you (and anyone else involved) are very clear on the distinction between a breech birth and a breech delivery - Mary Cronk (who is probably the UK expert on vaginal breech birth) sums it up quite nicely in this article. As has been said, googling Mary Cronk in general is also well worth doing.
ECV success rates are, on average, 50%. There is a very small chance that the procedure may cause the baby distress to the point it needs to be delivered immediately by CS, and so an ECV should only be performed in a hospital with a theatre - but it is a very small risk. Success rate will vary with the skill/experience of the practitioner and with the position of the baby, so ask a lot of questions before deciding - if your baby is in the right position and you have a skilled Obs the chance of them turning could be a LOT higher. Different women report the experience as anywhere between mildly uncomfortable and extremely painful - if you do decide to go for it remember you can tell (not ask ) them to stop at any point if you decide it feels wrong.
If you want to consider vaginal breech birth within the NHS you'll probably have a fight on your hands. As soon as you're flagged as breech you get shunted into consultant led care and will be treated as "abnormal" (probably best solved with a scalpel). Few consultants will have the knowledge to talk about vaginal breech birth, as they are unlikely to have seen it. NICE guidelines recommend against it, and the main reason they quote is lack of MW skills. Best bet is to get an appointment with the Head of Midwifery and dicuss the situation with her - she may have breech skills in house and be happy to use them. Failing that you could write a letter to the Head of Midwifery and the head of your PCT stating you intend to birth your baby vaginally and you expect them to provide MWs with suitable skills - depends how resiliant your feeling. I have heard of a PCT paying for an IM with breech skills so its not unheard of...
We were planning a home birth before the whole breech issue became concerning. We'd lost confidence in my CMW and were considering IMs anyway - so we just made strong breech skills a fundamental criteria. Its certainly worth calling some IMs local to you and seeing what they say - most will be more than happy to talk through the options and, may have local knowledge on how your PCT have reacted previously. You can find them here (and most will be more than happy to do that whether you book them or not).
And lastly (sorry - I've done another essay ), your baby is still more than likely to turn of their own accord. And if they don't there is no single right way to get them into the world alive whatever anyone says: all you can do is choose the set of risks that you feel is best for you and your family and take it from there.
Good luck deciding (but fingers crossed they turn)